Fluke 8050? User manual

P/N 530907
October 1979 R ev 2
7/84
8050
Α
Digital
M
ultimeter
Instruction Manual
FLU ΚΕ

N otwit h sta nd i n g any provision
o f
any ag r ee m ent t he followi
n g
wa rr a n ty is excl u sive :
Th eJ O HN
FLUKE MF G . CO ., I NC ., wa rr an ts each instrument it m a nu fact ur es to b e f r
ee
f r
om d efects i n mate
r
ial a nd
wo rkm
a n
s
h i p und e r no rm al u se a nd se r vice for t he p e r io d o f 1-yea r f r o m d ate of purc h ase . T h
iswa
rr
an ty exte ndso nly
to t heo r igi n al purc h ase r . Th is wa rr an ty s h
all
not apply to
f
u ses, d is p osa b le b atte r ies ( r ech
a
r
gea b le ty p e b atteries a
r
e
wa rr an te d f o r 90-d ays), o
r
any
pr
odu
ct o r p a rts w h ic h have b
ee
ns
ubj ect to
m
is u se, n eglect, acci
d
e n t,
o
r abno r mal
co nd itio ns o f ope r atio n s .
In t he even t o
f
fail ur e of
α pr o du ct cove r ed by t h is wa rr a n ty, J o hn F l uk e M fg . Co ., I n c ., will
re p air and cali br ate an
i n st rum e
n
t
r
et urned to
an a u t ho r ize d Se r vice F acility wit h i n 1 yea r
of
t he o r igi n al purchase
; p rovi ded t h e wa rr an tor's
exami
n
atio
n d iscloses to its satisfactio
n th
at t he p ro du ct was d efective . T h e wa
rr
an to
r
m ay, at its
op tion, r ep lace t he
pr o du ct i n lieu of re p ai r . W it h r ega rd to any
i
n st rum e n tr et urn e d wit h i n 1 yea r
of
t
heo
r
igi
n al purch
ase, sai d
r
e p ai
r
s
or
r ep lace m e n t will be m a de
wit h
ou
t
ch
a r
ge .
If t he fail
ur e h as bee n ca u sed by
m is u se, n
eglect, acci
den t, o
r
a bn o rm al
co nd itio n s of ope
r
atio
n
s,
r
ep
ai r s will be b ille d at α n
o
m i n al
cost . In s uch
case, an esti m ate will
b e s ubm itte d b efore
wo rk is sta r te d , if re qu
este d
.
ΤΗΕ F O RE GOIN G WA RRANTY IS IN L I EU O F A LL OT HER W A RR AN
TI
E S, EX PRE SS O R I
MPL I E D,
I NCLU DI N G BU T NOT L I M IT E D TO ANY I MPL I ED W A
R
RA N TY O F
MER
CHA N TA B I L ITY, F
IT
NE
SS,
O R AD E QU ACY F O R ANY
PAR TIC
ULA
R
PURP OS E O
R
U S E . J O
HN FLUKE MF
G . CO ., I NC ., S HA LL
NOT BE LIA BLE
F O R ANY S PE CIA L , I N CID ENTA L , O R CO NS E Q UEN TIA L DA M
AG ES . WHE THER IN
CON
TR ACT, TORT, OR OT HERW IS E .
If any f ail ure occurs, t he
followi
ng ste p
ss hou l
d be ta
k
e
n
:
WA RR A N TY
1 .

N otify t h e J O HN FLUKE MF G . CO ., I NC ., or n ea r est Se r vice facility, givi
ng
f u ll d etails of t h
e d
iffic
u lty, a nd
i n
cl
ud e t he m od el numb e r, type numb e r, a nd se r ial numb er . On recei
p
t of t h is i n fo rm atio n , service d ata, or
sh i pp i n g i n str u ctio
n
s
will
b e forwa rd e d to you .
2 .

On
r
ecei
p
t of
t h e s h i pp i ng i n st ru ctio n s, forward t h e inst ru me n t, t r a n spo r tatio n p re p ai
d . R ep ai r s will b e
m ade at
t
he Service F acility a nd t h e i n str um en t ret urne d, t r a n spo r tatio n p re p ai d .
S H I PP I NGTOM A NUFACT
URER
F
O
RREP AI
R
O
R
AD JUST
MEN T
All s h
i pm en ts of J O HN FLUKE MF G . CO ., I NC ., i n str um e n ts s h o u l d be m ade via U nite d P a r cel Service or "Best W ay"'
pr ep ai d . The i n str um ent s hou l d b e s
h
i pped i n t he
origi
n al pack ing carto
n ;
or
if
it is not availa b le, use any s u ita b le
con tai n e r t h at is
r
igi d a nd
of a
de
qu ate
size .
If
α
s
ub
stit
u te co
n tai n
e
r
is
u
sed ,
t he i n st rum e n t
shou
l
dbe wra pped
i
n pap
er
a nd s urr o und ed wit
h
at least
fo
ur
inc hes
of excelsior o
r simila rs hock
-a
b sorbi ng m ate r ial .
C LAI M F O R DA MAG E IN SH I PMEN T TO O R IGI NA L PUR CH AS ER
T he i n str um en t s ho u ld be t h orough ly i n sp ecte d im m ed iately upon o r igi n al d
elivery
to pu rc
hase r .
All m aterial i n the
con tai n e r s h o u l d bech ec
ke
d agai
n
st t he en close
dpack i
ng
list
. T
he
m a nu fact u
rer will n
ot
be r
espo
n si
b
le for s h
ortages
agai n st t he pac k i ng s h eet un less
n
otifie d i mm ed iately . If t he i n str um e n t is d amage d
i n
anyway, α
clai m
s h ou
l
d be file d
wit h t he ca rr ie r i
m
med
iately .
(To ob
tai nαqu
otatio
n
to r e pair
sh i pm e n t
da
m age, con tact t h e n earest F l uk e Tec h nical
Ce n ter
.)
F
i n
al clai
m a nd n egotiatio n s wit h t he ca rr ie r m u st be co mp lete d b y t he c u sto m e r .
T he J OHN FLUKE MF G . CO .,
I N C, will b eha pp y to a n swe r all a pp licatio n s o
r
use qu
estio n s, w h ic h will
enh
a nce yo ur
use of t h is i n st rum en t . P lease
add r
ess
yo
ur
r
e qu ests o
r
co
r res
p o nd
ence to : J O HN FLUKE MF G . CO ., I N
C .,
Ρ .
Ο . BOX
C9090, EVERE TT, W ASH
I N GTO N
98206,
ΑΤΤΝ
: Sales De
p t . Fo r Eur o pean C u sto m e r s : F l uke ( H olla nd ) B .V ., Ρ . Ο . Box
5053, 5004 ΕΒ , Tilb ur g, T he N
ethe r
la nd s .
' F or European custo
m
e
rs, Air Fr eig h t pr ep ai d .
J ohn
F l uk e M fg . Co ., Inc ., Ρ . Ο . Box C9090,
E verett, W as h i ngton 98206
R ev . 6/81

3
Table of Co n tents
SE CTIO N TIT LE

P AG E
1

I NT
R
OD U CTIO NAND
SPE CI F ICATIO N S . . ..... .... ...... . . .....
. . . .
1-1
1-1 .

IN T RO DU CT I
O
N . . ........ .... ... . ..... . . . ....... . . .... ... . .
1-1
14 .

O P T I ON S A ND ACC E SSO R IE S
. . . . . ..... .... ...... . . .... ... . . 1-1
1-5 .

S PE C IFI CA TI ON S . . .... .................... . . . . . ........... . 1-1
2

O
PER ATIO N ......
. ..... . ......... . ... .... .... . .. . ..
.... . .
....
. . .
.
. 2-1
2-1 .

IN TR O DU C TI ON . ....... . . . . .................... . . .... ... ... 2-1
2-3 .

SE TT IN G UPYO UR IN S TRUMEN T .............. . . .... ... ... 2-1
2-4 .

Unp ac k
i
n g .... . . .... . ... ... ..................... . ..... . . ... 2-1
2-8 .

AC
Lin e V o l
tage R e qui re m e n ts .............................. . 2-1
2-10 .

Fu se R e p lace m e n t ... . . ......................... . ........... . 2-1
2-13 .

FRONT P A NEL FE A T U RE S ................. . ................ . 2-2
2-15 .

Di s pl a y .......... . ............. . . . . . . . .... . . ...... . ....... . 2-2
2-18 .

S I G N A L INPU T LIMIT S

......... . . . . . . . .... ... ..... . ...... . . 2-2
2-20 .

O
PER A TIN
G
T E C HNI Q
UE S ..... .... ... . . . . . ... ..............
2-3
2-22 .

AC/ D C Voltage (V) ...... . . . . . ................... . ....
. . . ... 2-3
2-24 .

AC/ D C Current
(
m A)

. . . . . . ..................... . . .... . . ....

Ζ-3
2-26 .

Resistance (fl) ... ... . ... . . .
..................... ..
.... . ..... 2-7
2-28 .

Co n d u cta n ce(S
= 1 Ω ) .......................... . ..... . ...... 2-7
2-30 .

Di ode T est
. .
...... . . ................ . ........ . ...... . ..... . 2-7
2-32 .

R e l at iv e(REL A TI V E) ................ . ........ . ...... . ..... . 2-7
2-36 .

Decibel (dB) ................... . . . . . . . . . . . . . .............. . . 2-11
2-38 .

INITI A LC HECKOUT PR OC EDURE . . ... . . . . . . . ............ . .
2-12
2-41 .
A
PPLI
CA TI ON S
. . .............
. . . . . . . ..... . . .............. . . 2-12
2-43 .

D C V o l tage M eas u re
m e n t ... ..................... . . ..... . .... 2-12
2-51 .

Current
M
eas u
re m e n t . . .... ..................... . . .......... 2-13
2-56 .

R es i sta n ce M
eas u
reme n t . ... .................... . . .... . ...... 2-13
2-62
.

Co n
d u
cta
n ce M eas u re
m en t
.....................
. . ..... . ...... 2-14
2-80 .

R
elat i
ve
M eas u re m e n t .......................... . .... . . ......
2-16
2-84 .

AC
V
o l tage
and
Current M eas u reme n t........... . . ..... . ...... 2-16
T
HE O RY O F O PER
ATIO N ............. . . . . . ... . . . . . . .
. ..... . ........
3-1
3-1
.

INTR O DU C TI O N ............. . .
..
.
. .
.... .
..
. ..............
. . 3-1
3-3 .

FUNC TI ONA L DE SC RIPTI O N

. . . . . .
. ..... . . . ...... . ....... . . 3-1
3-5
.

C IR C UIT DESCRIPTION
. . . . ...................... .
....... . . . 3 .1
i

(co n t inu edonpage
ii)

L ist of
F igures
FIG
URE

TIT LE

P AG E
F ro n tis p
iece 8050 Α Dig i ta l Mul t im eter
. . . . . ...... . . . . . ........... . . . . .
.
. . .
. .. ... . v i
1-1 .
8050A Dimensions . . . .... . ....... .... . . . .......... ... . . ..... ... ... . 1-6
2-1 . Co n trols, In dicators, a n d
Co
nn ectors ... .... .............. . . .... . . .... 2-2
2-2 .
Liqui d Crysta l Di s pl a y . . . . ...... .... ........ ... . . . .... ..... . ...... . . 2-4
2-3 . AC/ D C
V
o
l
tage O p e r atio n ...... .... ........ .......... ..... . ...... . . 2-5
2-4 . AC/
D
C C
u rre
n
t
O p erat i o n ...... .... ........ ...... . ... ..... . . ..... . . 2-6
2-5 .
R es i sta n ce
O p
erat i
o
n . ... ... ... ......... . . . . ............. . . ..... . . . . 2-7
2-6
.
Co n d u cta n ce O p erat i o n . . .... . . ......... . . . . . . ........... . ....... . . . 2-8
2-7 . Di ode Test O p erat i o n .... . . . ......... . ... ......... . ... ... ... ... .... 2-9
2-8 . R e l at iv e Operat i o n .' . . .... ... ....... . . . . .............. .... ... ... .... 2-10
2-9 . d
B V o l tage
O p
erat i
o
n .... . . ........ . . . . . .............. . . ..... . . .... 2-11
2-10 . C i rc
ui t
Loading
E
rror
.......... .... ......... . . . . . .... ..... . . . .... . .
2-13
2-11 . Ca
l c ul at in g Bu rde n V o l tage E rror ... .......... .... . . . ....... . ...... . . 2-14
2-12 . T ra n s
i
stor
B eta
T est
Fi
xt ure ...... ... ......... . . . . . . . . . ....... . ..... . 2-15
2-13 . d B C i rc ui t Ga in or L oss M eas u re m e n ts . . . . . . . . ..................... . . 2-17
2-14 . W ave f or m Co mp ar i so n s ...... . ........... ... .............
. ..... ... .
2-18
2-15 . Crest
F
actor . .
..
... ... .... . . ......... . . . . . . ............ . ...... . ... 2-19
2-16 . Total RM S V a lu e . . . . . .... . . ....... . . . ................ . . .... . ...... 2-19
2-17 . M eas ur in g A m plif i er B a n dw i dt h ...... .... .............. ... ... . . . ....
2-20
3-1 . 8050 Α Fun ct i o na l Bl ock Di agra m ..... .... ........
.
...... . . ... .
. . . .... 3-3
3-2
. - Α / D Co n verter ... . ..... . . ..... .. .
. ............
.. . . .
...
.... ... ..... 3-4
3-3 . Α / D Co nv erter W ave f or m s ..... . . . . ............. . . . . . . . .... . . ...... 3-5
3-4 . Mi croco mpu ter S implif ied Bl oc k Di agra m .... . . . . ..... . . . . . . . . ..... . . 3-6
3-5 . S i g n a l Co n d i t i o
nin g
. . ... .... . . . . .......... .... . . . . ....... . . . .... . . . 3-7
3-6 . RM S Co
n
verter ..... . . ... . . . . ............ .. .... . . ....... . ...... . . . 3-9
4-1 . Di zi μ l ay P C B Access . . . .... . . .
........ . . . . . . . ............. . .... . ... . 43
4-2 . Ca li brat i o n Ad j u st m e n t L ocat i o n
s
.... .... ............... ... .... . . ....
49

8050 Α Digital Mu
itimete r
v i

1-1 . I N
T R OD U CTIO N
1-2 .

Your
J ohn Fluk e Model8050A i
s
α
portab
l ebenc h -
type
d i g i ta l mul t im eter (DMM) w i t h α
4-1/2
d i g i t liqui d
crysta l d i sp l a y (L C D) . T he 8050 Α h as all t he f o ll ow in g
in du stry-sta n dard f eat
u res
:
ι

V
o l tage
m easu re m e n ts f ro m
10 μ
V to
Ι OOO
V do an
d
10
m V to 750 V tr u e-r m s ac .
ι

C u rre
n t m eas u re m e n ts f ro m 10 ηΑ to 2 Α do an d 10
μΑ to 2
Α tr u e-r m s
ac .
ι

R es i sta n ce m easu
re
m
e n
ts
f ro
m ΙΟ mil to ΖΟΜΩ .
Th e 8050 Α also h as se v era l s pec i a l m easu re m en t f eat u res .
Th ese s pec i a l f eat u res i n c lu de t h e following-
0

Co n d u cta n ce m easu re m en ts up to 100,000 ΜΩ .
ι

V o l tage m eas u re m en ts i ndec i bels, t h at can be
re f ere n ced to 1 of 16 u ser se l ected re f erence
imp eda n ces .
ι

R
es i sta nce ra n ges t h at s uppl ye n o u g h vo l tage to
t u r n on α ΡΝ j un ct i o n to allow d i odes a n d
tra ns i stors to be tested .
T he ab i lity to store an y inpu t s i g n a l as
an
o
ff set or
relat i ve re f ere n ce va lu e .
Sectio n 1
Introduction an d Specificatio ns
ι

A
uto m at i c p o l ar i ty in d i cat i o n a n d overra n ge
i n d i cat i o n .
ι

P
rotect i on f ro m ove r l oads a n d p rotect i on f ro m
trans i en ts o f up to 6k
V,
10 mi croseconds .
ι

Dual-slope in tegrat i on α /d co
n vers i o n
to en sure
no i se- f ree m
easu re m en ts .
L on g ter m ca li brat i o n stab i lity (1 year) .
1-3 .

T
h e 8050 Α i s warra n ted f or α p er i od o f one year
upon s
hipm e n t o f t he in str um en t to t he or i gi n a l
pu
rchaser . Co n d i t i o ns o f t he
warra n ty are g
i
ven
at t he
f ron
t o f t hi s m a nu a l . Th e 8050 Α is t ypi ca ll
yp
owered f ro m
ac lin e vo l tages b u t m ay be p
owe r ed b y t he o p t i o n
a
l
rec h argeab l e battery .
1-4 . O
P TIO N S a nd ACC E SSO R I E S
1-5 . T h e u se o f t h
e
8050
Α
can
be enh a nced b y t he
accessories
avai l ab l e f or t hi s in str um en t . Th e accessories
are li sted
in T ab l e Ι -1 . T hi s in st r um en t canbe orde r ed
w i t
h t h e O p t i o n 805 ΟΑ
-01 R ec h argeab l
e B attery .
D eta il
ed inf or m at i on on
opt i o n
s an d accessor i es i s
con ta in
ed in Sect i o n 6
o f t hi s m anu a
l .
1-6 . S PE CI F
ICATIO N S
1-7 .

S p
ecificat i ons f or t he 8050 Α are li sted in T ab l e 1-2 .
Specifications
f or t he O p t i o n 8050 Α -01 R ec h argeab l e
B attery an d oth
er accessory s p ecificat i o ns are g
iv
en in
Sect i o n6 o
f t hi s m a nua l .

I NTR OD U CTIO
N
S PE CI
FICATIO NS
ELE CT R ICA L . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . The elect
r ical sp ecificatio ns give n apply
fo r an op e r ati ng
tem-
perature of
18°C to 28°C (64 .4° Fto 82 .4° F),
r elative hum i d ity up to
90%, an
dα 1-year cali b ration cycle .
Fun ctio ns . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DC volts, AC volts (li n ea r a nd dB), DC c ur re n t,
AC c
urr
e
n t,
r
esista n ce,
d
io de
test, co ndu cta n ce, r
elative .
DC V oltage
Ta b le 1-1 .
8050A Accessories
Ta b le 1-2 . 8050 ΑS p
ecificatio ns
I NPU T I MPE DA
N
C E . . . . . . . . . . . . ... . . . . .

10 ΜΩ i n p arallel wit h <100 pF, all ra n ges .
N O RM A L M OD E REJE CTIO N R
ATIO

. . .

>60 dB at 60 Hz or 50 Hz .
CO
MM
O
N
M OD E REJE
CTIO N R ATIO . . .

>90 dB at d c, 50 Hz or 60 Hz (1 k Ω unb ala n ced)
(>120 dB availa b le on r e qu est)
CO MM ONM OD E V O L TAG E (M AXI MUM)

500
Vdoo
r p ea k ac
RE SP O N SE TIME TO
... . . . . . . . . . . . . . . . .

1 seco nd maxim u m
RAT E D ACC UR ACY
M AXI MUM I NPU T
. . . . . . . . . . . . .
. . . . . . . . .

1000 V d o or p eak acco n ti nu o us (less t ha n10
seco nd s du ratio n on
both t h e 200 mV a n
d 2
V r
an
ges) .
'DC voltages can also be meas u re du si n g t h
e d
B mo de wit h .01 dB r
esol u tio
n
b
etwee n
5% of r an ge and f u ll range .
M OD EL
D E SC R I P TIO N
M
OD
EL
D E SC R I P TIO N
C86 Ru gge d ize d Ca
r rying Case 80J-10 C
u rr en t S hun t
Υ 8205 Soft Ca r ryi
ng Case
80 Κ -6 H ig h V
oltage Pro be
MOO-200-611 Offset M o un
ti n g Kit
80
Κ -40
H ig hV oltage
Pro be
MOO-200-612
Cente r M ou nti ng Kit 83- RF RF
Pro b e
MOO-200-613
D u al M o un ti ng
Kit
85- RF RF Pr
ob e
80T-
Η To uch - H ol d Pr o be Y81 00 DC/AC
C urr en t Pr o be
80T-150C Te mp e r at ur ePro
b e, Celsi u s
Y81 01 AC C ur re n
t
T
r an sfo r mer
807-150 F Tem p
e r at ur e Pr o b e, Fa h re nh eit Υ 8134 Del
u xe Test Lea dSet
(safety d esig n e d )
80
Ι
-600
Cu rr en t Tran sfo rm e r Υ 8140 Sli m - F lex
Test L eads
R A NG E
RE
SO LU
TIO
N ACC UR ACY fo r 1-Yea r
±200 m V 10 μV
±2 V
100 μ V
±20 V
1
mV
±(0.03% of rea d i n g
+2
d igits) .
±200 V 10 mV
±1000 V 100 mV

Ta b le 1-2 . 8050
Α Specificatio ns ( οοπ t)
I N
TR ODU
CTIO N
SPECIF ICATIO
N S
AC V
olts (Tr u e RM
S R espond i n g,
AC Co up le d )
V O L TAG
E RE ADO UT ACC UR ACY . . . ...

t(% of r ea d
i ng
+
numb e r of d igits), b etwee n 5% of r an ge a nd f u ll
r an ge .
"' Τy ρίεα //y 3 to 5 digits
of r attle
will b eob serve d at f u ll scale at 20 Hz .
RE SO LU TIO N . . . .
. . . . . . . . . . . . ..
. . . . . . . .

0 .01 dB fro m 5% of scale to
f u ll scale ; 0 .1 dB fr o m 1-5% of scale, 1 dB
below 1% of
scale
V O L
T - HzPR OD U CT

10' m ax (200 V max @ 50
kH z)
EXT EN D E D dB S EN
SITI V ITY
. . . . . . . . . . .

Ty p ically
-72 dB
(600 Π R ef) ±1 dB to 10 kH z
E XT EN DED FRE Q UEN CY RE SP
O
N
SE . .

Ty p ically
-3
d El at 200 kH z
CO MM O N M OD E REJE CTIO N . . . . . . . . . .

>60 dB at 50 Hz or 60 Hz
R ATIO (1 k Ω unb ala n ce)
C RE ST F ACTO RR
A
N G E . . . . . ... . . . . . . .

W avefo
r
ms
wit h α P eak/ RM S r atio
of 1 :1 to 3 :1 at f u ll scale,
i n
c
r easing d ow n ra n ge
I NPU T I MPE DA N C E . . . . . . . . . . . . . . . .. ...

10 ΜΩ i npa r allel
wit h <100 pF
M AXI MUM
I NPU T V
O
L TAG E
. . . .. .
. .
. ..

750 V rm s or 1o00 V p eak co
n ti nu ou s (less
t h a n 10 seco nd s dur atio n
on b ot h t h e 200 mV
a nd 2 V r a n ges),
n ot to excee d t he volt- h
ertz
pro du ct of 10'
RE S P O N SE TIME

. . . . . . . . . . . . . . . . . . . . . .

2 seco nd
s maxi mum wit h i n α r an ge
REFEREN CE
IMPE DA NC ES . . . . . . . . . . . .

Sixtee nu ser-selecta b le
i mp eda nce
r efere n ce levels a r e p rovi d e d to
r efe r en ce α0d Bm, 1 mW
level (50 Ω , 75 Π , 930,
110171, 1250, 1350,
1500, 2500,3000,5000,
6000,
8000,9000,10000,12000),an d an
80 i mp eda n ce r
efere n ce level is pr
ovi de d to r efe
r
e
n
ce
α 0 dBW level .
dB Ranges
NOTE . On req u est, t
h e
NOT
S PE C IFIED portion of t h e 100 Υ -750V
Ra nge can be exten d e d
to t h e Vo l t- H ertz Product of 10?
INPU
T Ι dBm
VO L TAG
E
(600 Ω
REF)
0
.77 mV -2 mV
2 mV -2 V
0 .1 V -2 V
1 V -20 V
10 V - 200 V
100 V - 750
V
-60 το -52
-52 to
+8
-18 to +8
+2 το +28
+22 το +48
+42 το +60
R A NG E

20 Hz

45 Hz

1 kH z

10 kH z

20
kH z

50kH
z
ACC UR ACY : fro m 596 of
r an ge to f u ll scale, 1-year
When
200 m V ra n ge
is
selected
t
he 8050 Α a u toranges fo r b est accuracy fo r2 V i npu ts and less .
I NPU T
VOLTAGE
RE SO LU TIO N
R A
N
GE
20Hz** 45 Hz 1 kH z 10 kH z
20 kH z 50 kH
z
10 mV -200 m V
1011 V
200 mV Ι
0 .1V - 2 V
1004V
2 Υ
1%+10
.5%+10
1%+10 5%+30
1 V - 20 V
1 mV
20 V ι
10 V - 200 V
10 mV
200 V l
100 V - 750 V
100 mV
750 V

INTRODUCTION
SPECIFICATIONS
Table 1-2 . 8050 Α S pecifications (cont)
OC Current
O VERLOAD PROTECTION (ac/dc) . . . . . .

2A/250V f use in series with 3A/600V fuse
(for h igh e nergy sources)
AC Current (True RMS R esponding, AC
Coupled)
""Ty p ί cally
3 to 5d
igits of r attle will b e observe
d at
f
u ll
scale
at 20
Η
z .
C REST F ACTORRANGE . . . . . . . . . . . . . . .

W aveforms with
αP
eak/RMS ratio of 1 :1
to 3 :1 at full scale
R esistance
O
VERL OAD PR OT E CTIO N . . . . . . . . . . . . .

500
V dc/ac rm s on
all ra n ges
OPEN CIRCUIT V OLTAGE
. . . . . . . . . . . . . .

Less than 3 .5V on
all ranges
RESPONSE TIME

. . . . . . . . . . . . . . . . . . . . . .

10
seconds maximum
on 20 ΜΩ r ange ; 2 seconds
m aximum
on all
(TO R ATED ACCURACY)

other ranges
DIODE T EST . . . . . . . . . . . . . . . . . . . . . . . . . . .

T hese
three ranges h ave enough voltage to turn on silicon junctions
to check for proper forward-t0-back resistance . The 2 k Ω r ange is
p referred and it marker) with α
ΙαΓοθ r d
iode symbol
on
the front
panelof the
instrument . The
three non-diode
test ranges will n otturn
on silicon j un ctio ns so i n
-ci r cu it
r
esista n ce
m easu re m e n ts can b e
made
with t hese three
ranges
R ANGE RESOLUTION
ACCURACY
for 1-Year BURDEN VOLTAGE
200 μΑ 0 .01 μΑ
2 mA 0 .1 μΑ
20 m A 1 μΑ
i(0
.3 ο / ο of reading + 2 d igits 0.3V max
200 mA 10 μΑ
2000 mA 100 μΑ 0 .9V m ax
INPUT
CURRENT
RESOLUTION RANGE
20 Hz** 45 Hz 2
kHz 10 kHz
20 kHz
BURDEN
VOLTAGE
10 μΑ - 200 μΑ 0 .01 μΑ 200
1A
Α ι
Ι 100 μΑ -2mA 0 .1 MA 2 mA
Ι
1 mA - 20 m A 1 MA 20 mA 2%+10 1%+10 2%+10
0 .3V rms m ax
10 m A - 200 mA 10 μΑ 200 mA
ι
100 m A - 2000 mA
ι
100
μΑ
ι
2000 mA
ι ι
0 .9V
rms
m
ax
t ι -6, έε
"_ . ;«
."τ
F
ULL SCALE VOLTAGE ACROSS
R ANGE RESOLUTION ACCURACY for 1-Year
UNKNOWN RESISTANCE
200 Ω 0 .01 Ω .19V
+
2±(0 .1%
reading
digits + .02n)
2 k Ω
0
.1n
1
.2V
20 k
Ω
1 Ω
d igits)
.2V
±(,05% .of reading + 2
200 k
Ω
1092 2V
2000 k Ω 100n
.2V
20
ΜΩ
1
k
Ω
±( ο 25 ωα r
eading
+3
d igits)
2V

Ta b le 1-2 . 8050 Α S p eci f
icatio
n
s (con
t)
I
NT R OD U CTIO
N
S PE CI F ICATIO NS
Co ndu cta n ce
M AXI
MUM OPEN
CI R CU IT
V O L TAG
E . .

<3
.S
V
O VERL OAD PR OT E CTIO N . . . . . . . . . . . . .

500 V dc/ac rm s
on all r an ges
CO NDU CTA N C E UN ITS . .
. .
. . ..
. . . . . . . .

W
e u se t h e i n ter n atio n al
un
it of co
ndu cta n ce, t he sieme n = S =1/
Π .
A n
ot he r un it of co ndu cta n ce is t he m ho
R elative
REL ATI VE REFEREN
C E
. ..
. .. . .
. . . . . . . .

An in pu t app lie d w h en t he REL ATI VE bu tto n is de pr esse d toth
eO Ν
p ositio n
is h eld as "0" r efere nce poi n t . S ub se qu e n t r ea d i ngs i nd
icate
t he d eviation
(t) fro
m t h is p oi n t . ( N ote : REL a nnun ciato r i nd icates
w h e n t h is m ode
is e
n
a
b
le d )
REL ATI VE ACC UR ACY
. . . . . . . . . . . . . . . . .

Error will n ot excee d t h e s um of t he e rr o rs of t h
e two meas u re m e n ts
ENV I R O NMEN TA L
Te
mp e r
at
ur
e Coefficient . . . . . . . . ... . . . . . . .

<0 .1 ti m es t he ap plica b le acc ur acy s p ecificatio np
e
r
°C fo r 0°C to
18°C a nd 28°C to 50°C (32° F to 64 .4° F and 82 .4° F
to 122° F )
O p erati n g Tem p erat ure . . . . . . . . . . . . . . . . . . .

0°C to
50°C (32° F to 122° F )
Sto r age
Te
mp
e
r
at ur e . . . . . . . . . . . . . . . . . . . . .

(wit
ho u t batte r ies) : -40°C to +70°C (-40° F to
+158°
F )
(wit h
batteries) : -40°C to +50°C (-40° F to +122° F )
R elative Hu mi d ity . . . . . . . . . . . . . . . . . . . . . . . . .

Up to 90%, 0°C to 35°C (32-95° F ), up to 70%, 35°C
to 50°C (95-
122° F), exce p t on2000
k Π , 20 ΜΩ , a nd 200 n S r a n ges w here it is up
to 80%,
0°C to 35°C (32-95° F )
G ENER A L
M axim u m Commo n Mode V oltage . . .
. . . . . .

500 V d c . or p ea kac (low terminal pote n tial wit h r espect to powe r li ne
grou nd
Size ... . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . .

22 cm χ6 c m χ 25 c m (8V z in χ 2' h χ10 i n ) see F igu r
e
1-1
W eig ht . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. .

1 .08 k g (2 I b 6 oz)
P owe r Re qu i r e m e n ts ( L i n
e Only
M
od els)
L I NE VO L TAG
E . . . . . . . . . . . . . . . . . . . . . . . . 90
to 110 V ac47 to 440 Hz
105
to 132 V ac, 47 to 440 Hz
200 to 264
V ac, 47 to
440
Hz
Γαο t
ο r γο o n figu r ο d for o u otQmo r op coifi οd v oitaga
P O WER CO N S UMP TIO N . . . . . . . . . . . . . . .

4 W max
Sta nd a rds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .,

I E C 348
Pr otectio
n Class
1
RA NG
E
RESOLU TIO
N ACC UR
ACY for
1-Yea r
2 mS .1 μ S (10 ΜΩ ) t(0.1%
of
r ea d i ng
+ 5
d
igits)
200
n S .01
n
S
±(0 .5°/ ο of
r ea d i ng +20 d
igits)
(100 000 ΜΩ
)

I N TR OD U CTIO N
S PE CIF ICATIONS
8 .55 i n . (21,72 cm)-
7 .50 i n . (19,05 cm)
2.52 in . (6,40 c m)
10 .65 i n . (27,05 cm)
-9.90 i n .( Ζ
5,15 cm)
Figure 1-1 . 8050 Α Dime n sio n s

2-1 .I
N TR OD U CTIO N
2-2 .
Thi s sect i o n descr i bes h ow to set
up
a n d m a ke
m easu re m e n ts w i t h y our 8050 Α . E ven t h o ugh yo u m ay
h ave u sed α mul
t im eter be f ore, we
reco mm en d t h at yo u
read
t
he en
t i re sect i on care full y so t h at yo
u can u
se all
o f
t he 8050 Α f eat u res .
2-3 . S
E TTI N G UP YO UR IN STRUMEN T
2-4 . Unp ac king
2-5 .

T hi s in stru m en t is s hi pped in α s pec i a l p rotect i ve
co n ta in er t h at s h o ul
d p reve n
t da m age to t he 8050 Α
dur in
g
s
hippin g . C h ec k t h e s hippin g order
aga in st t he
con te n ts o f t
he con
ta
in
er an d re p ort a n y da m age or s h ort
s hipm
en t to t he p lace o f pu rc hase or t he n
earest Fluke
Tec
hni
ca
l
Serv
i ce
Ce
n ter . Α li st
o
f t
h
ese serv
i ce ce n ters i s
l ocated in Sect i on5 . T he con ta in er sh ou l d in c lu de t he
f o ll ow in g .
ι

Th e
8050
Α M ult im ete τ
ι

Two test l eads (o
n e red a n d πη
e b lac
k )
ι

Lin ep ower cord
ι
T he 8050 Α In struct i o n Manual
2{ ι .

If res hipm en t o f t h e in str um en t i s n
ecessary, pl ease
u se t he or i g in a l s h i p p in g con ta in er . If t heor
i g in a l
con ta in er is n ot ava il ab l e, be su re t h at
ade qu ate
pr otect i o n i s p rov i ded to p reve n
t
da m age d ur
in g
s hipm en t . W e reco mm en d t h at the in str um
e
n
t be
su rro
u ndedby at l
east t h ree in ch
es
o
f s hock
-absorbi ng
m at ε ria l οη all οί 1c~ νΙ L 11C GUL I L d llICT .
2-1 .

R e m
ove
t he 8050 Α f ro m t he co n ta in er a n d pl ace
it
in αcon ven i e n t l ocat i o n .
To
f ac i l i tate o p
erat i o n in
di ff ere n t l ocat i on s, t he carry
in gha n d l e on t h e meter can
Sectio
n 2
O p eration
be u sed as α pro p -sta
n d
or
p
os
i
t i o
n
ed
o u t o ft
h
e
way . To
p os i t i on
t he ha n d l e, pull o u tward
on
t hehubs o f
t h e
ha
nd l e an d rotate t h eh a n d l e in to pos i t i o n .
2-8 .

AC L ine V oltage R e qu ireme n ts
2-9 .

AC l i n e vo l tage req
ui
re
m
e n ts f o r yo u r 8050 Α a r e
li sted on α deca l
attac hed to t he botto
m
of t
h
e
in str um en t .
R e f er to
Sect i o n 4 f or t he proced u re to ch a nge t h e
ac lin e
vo
l tage sett in g .
CA U TIO N
Do not co nnect t h e p owe r ca b le to t h e
I n st rum e n t b efo r e verifying t h at t h e I n te nded
so ur ce matc hes t heαε li ne co nf ig ur atio n of
t
he I n st rum e n t .
2-10 .

Fu se R eplace m e n t
2-11 .

Th
ere
is
o n e, u ser re pl aceab l e, fu se in t he
8050
Α .
Th e fu se, F 1, a
n d t h e f use ho l der f or m
an in tegra l p art o f
t he
m A i npu t connector an d can be re m o ved w i t h o
u
t
s p ecia l too l s.
Th e f use rat in g
is :
2
Α , normal b l ow
(reco mm e n ded part AGX2) .
2-12 .

U
se t he f o ll ow in gp rocedu re to re pl ace t he fu se,
Σ F1 :
1 .

Set t h eP O W ER sw i tc h to O FF .
2 .

R e m ove t he inpu t p ower cord f ro m t h e 8050 Α .
W A RN I N G
DO NOT ATTEMPT TO REP LAC E ΤΗΕ FU S E
W IT H ΤΗΕ I
N ST RUMEN TT URNE D ON O R
CO NNECT E D TO L I NE P O WER .

OPERATION
FR ONTPA NEL FE AT URE
S
3 .

R efer to F
igure 2-1, i tem 5 f o r t he location o f
t he fuse
h older . The fuse h
older
is an integral
p art of t he m A input
connector .
4 .

Using α coin
o r w ide b lade screwdriver, p ush in
whileturning the f use h older
in t he
direction of
the arrowon the front
panel decal .
5 .
Pull
out
the fuse h older and r eplace the
defective fuse .
2-13 .
FRONT P A NEL FE AT
URE S
2-14 .

B efore using
your multimeter,
take α f ew
m inutes
to
become
familiar
with
t he u se of t he controls,
indicators, and connectors
of t he 8050 Α . The f ront p anel
featu r es are shown in
Figure 2-1 and described in Table 2-
1 . The f eatures of
the Liquid Crystal Display (LCD) are
also
described in t he f ollowing p aragraph
.
2-15
. Display
2-16 .

The f eatures of t he Liquid Crystal
Display
(LCD)
are shown in detail in
Figu r e 2-2 . The position oft he
floating decimal p oint i s determined by t he range selected
(for linear measurements) . The m
aximum
measurement
value that canb e displayed i s one
count l
ess than t he
F ig ur e 2-1 . Co n tr ols, In d icators, a nd Co n nectors
range
selecte d
(e .g ., m aximum measured voltage that can
be displayed in t he
200 m V range wouldb
e 199
.99 m V) .
2-17
.

To
extend
the l ife of t he L CD a nd to ensure
that
the display will be ready
to operate, observe
the
f ollowing
p recautions :
ι

D o n ot store or
u se the instrument in temp eratures
above or below
those specified in Section 1 .
ι

D o not store or u se the
instrument in humidity
above that specified in
Section 1 .
ΝΟΤΕ
L ow tem p eratures
(within the specified
operating limits) will
cause the L CD r esponse
to be sluggish .
ι

Avoid prolonged exposu r e
of the L CD to direct
sunlight
(ultraviolet)
.
2-18 .

SIGN A L I NPU T L I M ITS
CA U TIO N
E xcee d i ng t h e m axI mum
sig n al I npu t limits
can da m age t he I n str u me n t .
'Nut
1015 έ
i
C
σ
Ι Ι

11

1
U
min

200 2W
1
ϋϋ ~
f iv ι

ι

~ ι j ι f
τι
1 υΓ " D
. ;
. 1 .
. ι
ι
0
:
Wu 1 ,
0
MA
ίΑ
ευτε
C F -7
5
Fιυ κ ε
σσ
α dB i7
ωω
Μ ,ι
8050 ρ
COM
M ON
S

1
1
Λ
Υ / k Ω /$
WW AC N-- .-e
!
ΦΟί ι Ο t
ί )IGITAL
M UL I M
ET
ER
ΟΝ
OFF
REL
ATI
VE
ο 0

Ta b le 2-1 . 8050 Α
Co
n
trols, I nd lcato ι s, a nd Co nn ectors
O
PER
ATIO N
O
PER ATI N
G
T
E C HN IO UE
S
2-19 .

B e f ore u s in g t
he 8050 Α , it is imp orta n t to n
ote t he
m ax imum inpu t limi ts t h at m ay be a ppli
ed to t he
in
str um e n t . T ab l e2-2
li
sts
t he m ax imum s i gn a l inpu t
leve l s a ll owed f or eac h
function,
ran
ge, a n d inpu t
connector .
W A RN I
NG
Τ U A V U IU ELE GT R IGA L 5 H OG K ,
DO NOT
CO NNE CT ΤΗΕ
CO MM ON INPU T
CO
N -
NE CTO R TO
ANY SO UR CE M O RE
THAN
500
V
DC, O R 500 V ACRM S A B O VE E
A RT H
G
R
O UN
D .
2-20 .
O PER ATI N
GT E C HN IQ UE S
2-21 .

Th e f ollow
in g p aragra ph s describe h ow to o p erate
t he 8050 Α in each o f i ts seve n prim ary
meas u re m en t
functions . R e f er to t he A ppli cat i o n s paragraph
s f or
additional m eas u re m en t tec hniqu
es .
2-22 .

AC/DC V oltage
(V)
2-23 .

Fi g u re 2-3 describes
h
ow to operate t he
8050
Α
f or
ac or do vo l tage m easu re m en ts . For all m eas urements,
se l ect t h e hi g h est ra
n ge t h at w ill p
rov i de t he re qui red
reso lu t i o n of t he m eas u re m en t . If m easu
ri
ng
an unkn ow n
vo l tage, set t he
DMM
on
t he h i g
h est ran ge, then
(if
n eeded) se
l ect α lower ra nge .
2-24 . AC/DC
Curro n t (mA)
2-25 .

Fi g u re 24 describes h ow to o p erate t he
8050 Α for
ac ordo cu rre n t meas u reme n ts . Tu rn o ff p ower
to t he
circ ui t be
in g m easu red
be
f ore brea kin g t he
c i rc ui t a n d
conn ect in g t h e 8050 Α in series w i t h t he curre n t sou rce . To
mini m iz e co mm o n m ode voltages, break t he circ ui t on t
he
gro un d s i de o f
t
he cu rre n t source . Th e m A inpu t
co nn ector
co n ta in s an i n-lin e fu se . If t he DMM
does n ot
res p o n d w hen m eas u ri ng cu rre n t, check t he f use (re f er to
t he fu se re pl ace m en t p roced u re in t hi s sect i o n ) . If
meas u ri n g an unknown curre n t, set t h e DMM on t he
hi g h est ran ge, t h en (i f needed) se l ect α lowe r r a n ge .
ITEM
ΝΟ . NAME
FUN CTIO N
1 Disp lay
4 1 /2-digit L CD d is p lay . U se d to i nd icate m eas ur e d i npu t values
and
an over
ι
an geco nd itio n . Also co n tai n s a nnun ciato ιs fo r h ig h voltage,
d
eci b el- d
is p lay, a nd r elative m eas ur e m en t f un ctions .
2 AC/DC
Fun ctio n
Α
two-position switc
h (push
IN and pu sh OU
T)
used to select ac :
Switc h
(IN) or d o (O U T) for c urr
ent or voltage
m easur eme n ts .
3 V / m A/
k
Π /
d
8/S
I n terloc k ed switc h es, u sed wit h t h e AC/DC Fun ctio n switc h to select
Fu
nctio n Switc h es
t h
e
meas
ur eme n t f un ctio n s . Pu s h i n g o ne switc h will release t h e
ot
h ers . T h
e d eci b el- d is p lay f un ctio n is selecte dby push i ng t he V
and m A switc hes
si mu ltaneo u sly . T he co ndu cta n ce f un ctio n is
selecte d by push ing t h e k Λ
switc ha nd on e of two p ai
r
s of R an ge
Fun ctio n switc h es .
4 R ange Switc h es
I n te r loc k ed switc hes t h
at select t h e m eas ur eme n t r an ges . Pu sh i n g
α switc h selects t he corresponding r an
ge a nd
r
eleases α de pr esse d
switc h (es) .
5 m
A I npu
t Co nn ector Α f use p
rotecte d i n pu t co nn ector for c urr e n t m eas ur eme n ts . Fuse
is accessi
b le f
r
om t h e fro n t p an el .
6 CO MM ON I npu t
Test lea d connector u se d as t he 1 οω orcommon i npu t
for all measure-
Connector m
en
t f
un ctio ns .
7
V / kC V S I npu t
Test lea d
conn ector u se d as t h e h ig h i npu t for all voltage, r esista n ce,
Co nnecto r
con ti nu ity, co ndu
ctance a nd d eci b el meas ure
m
en t f un ctions .
8 REL ATI VE Fun ctio n
Push-on/push-off switc h . Use d to select t he r elative f
un ctio
n
for
Switch
all meas ur e m en ts .
9 P O WER Switc h
Push-on/push-off switc h . U se d fo r en e r gizi n g a nd de-e n e r gizi n g
t h e i n st ru me n t .

O PER ATIO N
L CD
DIS P LAY
8050 Α -01 O NL
Y

DE CI BEL FUN CTIO N
L
O W
BATTERY I ND ICATO R

IN U S E
P O L A R ITY
SIGN
DISAB LE D D UR I N G
V
ac, m AAN D k Ω FUN CTIO NS
8050
Α
O
VERR ANG E INDICATION
8050 Α IMPR O PER SWITC
H SE TTI NG
8050 Α DIS
PL AY ANNUN
CIATO RS
H IG HV O L
TAG
E
(>40 V dc o
r ac
rms)
BEING
ME AS URE
D
REL ATI VE FU NCTIO N
IN U
SE
ΝΟΤΕ :

Position of d eci m
al point d ep en d ent
on r an ge selecte d .
NOTE :

T h is d isplay will
appea r if t he switc hes
of t h o ηο 6 οα ara
set in an i m p ro p er
configuration
(e .g . D C V 20 ΜΩ )
F igure 2-2
L i qu i d Crystal Display
ι
BT dB
i D ° d 0 ~
σ Q Uσ
α α α
σ
Νε L
ι

Ta b le 2-2 . M axI mum Inpu t Sig n al Limits
Figure 2-3 . AC/DC V oltage Operation
O PER ATIO
N
AC/DC VO L
TAG E
2- 5
FUN CTIO N
R ANG E
INPU T M AXI MUM
INPU
T
S ELE CT E D
S ELE CT E DT
ERM I N A L S O VERL OAD
DC
A LL R A N G E S
1000
V do or p ea k ac
VV
/ k Ω /S
or 20
V ,
200
V ,
750 V a nd 750 V rm s con ti nou s o r 10 7 V . H z
d Β
CO MM O N AC
2
V ,
200
m
V
750 V rm s fo r no lo n ge r t h an 15 secon d s o r 10 7 V -
H
z
DC
mA
or
A LL R A NG E
S mA a nd CO
MM
O
N
Do ub le fuse p rotecte d : 2
Α ,
250
V f
u se
i
n
series wit hα 3 Α , 600 V f u se
AC
V / k Ω
/S a nd
k Ω or S
A LL R A NG E
S
COMMON
500 V do or ac r ms

OPERATION
AC/0C
V
O L TAGE
CURRENT (mA)
1 . SELECT R ANGE
2 . SELECT FUNCTION
3 . CONNECT TEST LEADS
4 . SREAKCIRCUIT
5 .
PLACE
8050 Α m S ERIES
2-
6
Figure 2-4 . AC/DC
C u
r rent
Operatlon

2-26 .

Resistance (D)
2-27 .

F
ig u r e 2-5 d escribes
h
ow to operate t he 8050 Α f or
r es i
sta n ce m easu
r
e m
en
ts . W
h enk
Π is se l ected, erro n eo u s
m easu re m e n ts can
occ u r i f p
ower is p resent
in t
he
r es i sta n ce be
in g m easu red . En s u re t h
at p ower is
re m oved
be f o
r e m easu r in g in -c i rc ui tr es i sta n ces .
T
he AC/ D C
fun ct i o n switc h h as no e ff ect d u r in g res i sta n ce
m easu r e m e n ts .
2-28 .

Con du
cta n ce(S=1/ Ω )
2-29 .

Fi
gu re 2-6 descr i bes
h
ow to o p erate t h e 8050 Α f o r
con d
u cta nce m easu
re m
e n ts .
W
h en S=1/fl is se l ected,
two ra n ges o f m eas u
re m e n ts are
ava il ab l e, 2 mS a n d 200
n S . To se
l ect
either ra
n ge, p ress
both range sw
i
tc h es
(above
t he grey-s h aded area) simu lta neous l y .
2-30 .

Dio de Test
2-31 .

F ig
u
re 2-7
descr i bes h ow
to op erate t h e 8050 Α f or
d i ode
tests . T he t h ree res i sta n ce ra nges
w i t h t
h e d
i ode
sy
m bo l b es i de t h e ra n ge va lu e prov i de
α
m eas u re m en t
kvil~il li* I f ll
~~t :3~it

τ 3

άείι 5 ;ί
+
; Σ λθ 1~>
RE SISTA N C E ( k Ω )
1 . D E-ENER GIZ E CI R C U IT
TO BE
ME AS
URE D
2 . S ELE CT R AN G E
3 . S ELE CT FUN CTIO N
4 .
CO
NNE
CT
T E
ST
LE ADS
F igu r e 2-5 . R esista n ce O p eratio n
2-32 .

R elative (REL ATI
VE)
O PER ATIO N
REL ATI VE
voltage s
uffi cient
to ca u se α s
i
li con
j
un ctio n to co n d u ct .
Th ese
r an ges (2 k Π , 200
k Π an d 20 ΜΠ ) can be u sed to
c h ec k s i lico n dio d es and transistors
.
T he 2 k Π
r es i sta n ce
r ange is t he pre f e r red d i ode a n d t r an s i stor test in g r a
n ge
a n d is labe l ed w i t
h
t h e la r
gest diode sy m bo l ( ) .
F or α
sil
i
cond
i
ode,
t h e ty pi cal f orward b ias voltage
(on t h e 2
k
Π
-* ra n ge) is 0 .6 V . Α r eversed bias s ili cond
i ode
s h o ul dd i s p lay t h e overra n ge i n d i cato r (on t he2k Π
ra n ge) .
2-33 .

Fi g u re 2-8 descr i bes h ow to op erate t h e 8050
Α f or
re l at i ve m eas u re m en ts . T h e re
l
at i ve fun ct i o n stores
α
read in g as an o ff set or re l at i ve r e f
ere
n
ce
va lu e .
W
hen t he
REL AT I V E sw i tc h is set
to ON
du r in gα m easu
re m en t,
t h e va lu e o f t h at m eas u re m en t is sto r ed, an d t he
REL
(re l at i ve re f ere n
ce)
a nnun c i ator app ears to t h er i gh t o f t he
z eroed dis p lay .
S ubseque n t
m eas
u
re m
en
ts
(in
t he sa m e
fun ct
i
o
n a n d ra n ge) are d i sp l ayed as t he d iff erence
b etwee n t he m eas ured va lu e an d t he sto r ed re l
at i ve
re f eren ce .
2-7